Which of the following essential nutrients is responsible for the digestion and absorption of food and is a medium for chemical reactions throughout the body?

A) vitamins
B) minerals
C) water
D) protein

Water is responsible for the digestion and absorption of food as it helps to break down larger molecules into smaller ones that can be absorbed by the body. It also serves as a medium for chemical reactions and helps transport nutrients throughout the body. While vitamins, minerals, and protein are all important nutrients, they do not play as direct of a role in digestion and absorption as water does.